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Finding the Fourth Proportional to 213,696.60, 320,426.43 and 87,425.55

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Solution

The fourth proportional to 213,696.60, 320,426.43 and 87,425.55 is: 131,089.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,696.60 : 320,426.43 = 87,425.55 : x
  2. Step 2: Convert to fraction form
    213,696.60/320,426.43 = 87,425.55/x
  3. Step 3: Cross multiply
    213,696.60x = 320,426.43 × 87,425.55
  4. Step 4: Simplify right side
    213,696.60x = 28,013,456,877.29
  5. Step 5: Solve for x
    x = 28,013,456,877.29/213,696.60
  6. Step 6: Final answer
    x = 131,089.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.